[....] Starting enhanced syslogd: rsyslogd[ 13.653458] audit: type=1400 audit(1514706533.737:4): avc: denied { syslog } for pid=3174 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.540809] kasan: CONFIG_KASAN_INLINE enabled [ 26.545388] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.552736] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.558938] Dumping ftrace buffer: [ 26.562441] (ftrace buffer empty) [ 26.566118] Modules linked in: [ 26.569384] CPU: 0 PID: 3330 Comm: syzkaller722566 Not tainted 4.9.73-gf3f3457 #11 [ 26.577059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.586395] task: ffff8801c8fd1800 task.stack: ffff8801c1c88000 [ 26.592418] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 26.600645] RSP: 0018:ffff8801c1c8fa50 EFLAGS: 00010a07 [ 26.606056] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 26.613291] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 26.620523] RBP: ffff8801c1c8fa60 R08: 0000000000000001 R09: 0000000000000000 [ 26.627765] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 26.634996] R13: 0000000000000020 R14: ffff8801d06c2100 R15: dffffc0000000000 [ 26.642229] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a0e5840 [ 26.650417] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.656260] CR2: 0000000020001000 CR3: 00000001ca8e3000 CR4: 00000000001406f0 [ 26.663495] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.670732] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.677963] Stack: [ 26.680075] ffff8801c8fd1800 ffff8801d06c2258 ffff8801c1c8fac0 ffffffff82664fc1 [ 26.688019] ffff8801d06c2270 ffffed003a0d844b ffffed003a0d844e ffff8801d06c2268 [ 26.695958] dead4ead00000000 ffff8801d06c2240 0000000000000000 0000000000000000 [ 26.703906] Call Trace: [ 26.706466] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 26.712923] [] sg_finish_rem_req+0x2b5/0x340 [ 26.718942] [] sg_new_read.isra.20+0x39/0x3e0 [ 26.725049] [] ? sg_get_rq_mark+0x142/0x190 [ 26.730983] [] sg_read+0x8bd/0x1440 [ 26.736222] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.742854] [] ? lru_cache_add+0xd9/0x1e0 [ 26.748616] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 26.755676] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.762304] [] __vfs_read+0x103/0x670 [ 26.767720] [] ? default_llseek+0x290/0x290 [ 26.773652] [] ? fsnotify+0x86/0xf30 [ 26.778976] [] ? fsnotify+0xf30/0xf30 [ 26.784394] [] ? avc_policy_seqno+0x9/0x20 [ 26.790243] [] ? selinux_file_permission+0x82/0x460 [ 26.796874] [] ? security_file_permission+0x89/0x1e0 [ 26.803590] [] ? rw_verify_area+0xe5/0x2b0 [ 26.809436] [] vfs_read+0x11e/0x380 [ 26.814674] [] SyS_read+0xd9/0x1b0 [ 26.819825] [] ? vfs_copy_file_range+0x740/0x740 [ 26.826196] [] ? do_fast_syscall_32+0xcf/0x890 [ 26.832389] [] ? vfs_copy_file_range+0x740/0x740 [ 26.838755] [] do_fast_syscall_32+0x2f7/0x890 [ 26.844861] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.851490] [] entry_SYSENTER_compat+0x51/0x60 [ 26.857680] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 26.883860] RIP [] __free_pages+0x21/0x80 [ 26.889731] RSP [ 26.893713] ---[ end trace be6eef60a5983161 ]--- [ 26.898515] Kernel panic - not syncing: Fatal exception [ 26.904287] Dumping ftrace buffer: [ 26.907793] (ftrace buffer empty) [ 26.911465] Kernel Offset: disabled [ 26.915057] Rebooting in 86400 seconds..